One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,8)(5,6)(9,10)(11,14)(12,16)(13,15)(17,18)(19,27)(20,25)(21,24)(22,26)(23,31)(28,29)(30,32) involution — undirected(2,6)(7,8)(9,11,13,12)(10,14,15,16)(17,18)(19,28)(20,23)(21,24)(22,32)(25,31)(26,30)(27,29)(1,3,5,4)(2,7,6,8)(10,15)(14,16)(17,19)(18,23)(20,30)(21,31)(22,29)(24,27)(25,26)(28,32)(9,12,13,11)(10,16,15,14)(18,24)(19,29)(20,31)(22,30)(23,28)(25,27)(1,4,5,3)(2,8,6,7)(17,20,21,29)(18,25,24,28)(19,30,31,22)(23,26,27,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.